CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Statement of Comprehensive Income [Abstract]
Net income	$ 106,058	$ 96,280
Unrealized gains and losses on available for sale securities
Net gains (losses) arising during the period	27,212	(10,205)
Total	27,212	(10,205)
Unrealized gains and losses on derivatives (cash flow hedges)
Amounts reclassified to earnings	(218)	(222)
Total	(218)	(222)
Defined benefit pension and postretirement benefit plans
Amortization of actuarial net loss	88	35
Other comprehensive income (loss) , net	27,082	(10,392)
Total comprehensive income	$ 133,140	$ 85,888